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256 names per list, and why you shouldn't fill it all the way
By the end, you'll know how big to make each broadcast list, when to split it into several, who belongs on it, and what time to send it.
By Yodai · Published September 6, 2026 · Updated October 12, 2026
You type the message, open WhatsApp Business, and start marking contacts for the broadcast list. At 256, the app stops you cold: it won't take one more. That number isn't the real problem. The real problem is the temptation to fill the whole list just because there's room.
You've already decided who you're not going to message and which bucket each customer falls into. Now comes the part that decides whether the message actually lands or your number ends up muted: how many people you put on each list, who belongs there, and what time it goes out.
Why the limit isn't the number that matters
A broadcast list only delivers your message to people who have your number saved in their contacts. If a customer bought from you two years ago and never saved your number, your message never reaches them, and you won't notice at a glance: you only see it if you check who the message was delivered to.
That's why the 256-contact limit isn't really what holds you back. If you add 256 people and only 90 have you saved, the other 166 get nothing, and among the 90 who do receive it, some won't remember you anymore. That's the real risk: someone who wasn't expecting your message can block you or mark it as spam, and WhatsApp keeps an eye on those reports.
WhatsApp keeps that count, not you. Sometimes it warns you first with an in-app message ("Your account may be restricted soon") and sometimes it doesn't: its help center says it can suspend an account without prior warning, and that spam, automated, or bulk messaging is grounds for doing so. That's why you shouldn't wait to see the warning sign: avoid it from your very first broadcast.
Consider someone active if they've replied, bought something, or at least opened a message from you in the last three months. If you don't have that date tracked anywhere, count how many people wrote to you or bought from you that quarter and use that number as the real ceiling for your list, not the 256 the app allows. And the list should only include people who've given you permission to message them with offers, or who've already bought something similar to what you're promoting, and they need to be able to opt out easily and for free: that's what US law requires for commercial messages (the CAN-SPAM Act and the TCPA), and WhatsApp also requires businesses to get their customers' permission and to respect anyone who doesn't want more messages.
Adding everyone instead of making two lists
The costly mistake is grabbing your whole contact book, all 256 slots, and sending the same text to someone who bought last week and someone who asked about pricing eight months ago and never replied. The fix goes the other way: fill the list only as far as makes sense for that specific message, not as far as the app allows. Empty slots are almost always fine to leave.
How full to make each list, not how much it holds
That 20% you leave open isn't an oversight, it's a buffer. Every month a new customer signs up, and every month someone who stopped replying drops off. If you fill the list all the way, the next time you want to add someone you have to delete another first, and you usually delete the wrong one: you cut the newest addition instead of the person who hasn't opened anything in a year.
Think of the list like an appointment book, not a storage room. A storage room gets packed to the top because the more you fit in, the better. An appointment book is left with gaps on purpose, because new people are coming in next week and someone's going to cancel. If your broadcast list sits at 256 out of 256, it's lost that cushion: every new addition requires a manual removal first, and that removal gets decided in a rush and gets decided wrong.
One big list or several by bucket
- One send, less work putting the message together
- The same text has to work for someone who bought yesterday and someone who's never bought
- If you get reported as spam, your number pays the price, not the list
- The message changes one line depending on who it's going to, without rewriting the whole text
- If one list stops responding, you'll see it clearly without mixing it in with the others, even though reports from any of them count against that same number
- Takes a bit more work to set up the first time
- You can test a different send time on each one and compare who replies first
Which one should I pick: With more than 100 active contacts, use segmented lists. If your business barely reaches 40 or 50 saved customers, one list is enough: there's not enough volume for splitting to pay off. Between 60 and 100 contacts, a single list still works if the message fits everyone the same way, and it's worth splitting as soon as the text needs a different line depending on who it's going to.
The send time that doesn't give away that it's a broadcast
- 1Check who has you saved
A regular message reaches anyone, whether they have you saved or not, so it doesn't prove anything. Check the info on your last broadcast (press and hold the message, then tap Info): anyone who doesn't show as delivered probably doesn't have your number saved. Ask them privately to save it, as WhatsApp's help center recommends, or remove them from the list. - 2Pick your usual time slot, not a new one
If your business normally sends confirmations or reminders midmorning, the broadcast goes out at that same time. A message at 11 p.m. or first thing Sunday morning reads as an ad even if the text is identical to any other day's. - 3If you go over 100 contacts, split it into two batches
Send to half the list and wait twenty or thirty minutes before the second batch. This isn't a trick to game WhatsApp: it just means the replies don't all land at once, so you can answer them properly. - 4Check the number you're broadcasting from
The broadcast number has to be the same one you use to answer questions afterward. If you send from one number and reply from another, the customer writes back to whoever sent the message, and that conversation gets lost. - 5Note which list got which message and when
Without that record, there's no way to know afterward whether the problem was the text, the timing, or a poorly segmented list.
With the list sized right and the time picked, the send is ready to go out. What happens after you send it, who opened it, who bought, and who hasn't written back, is what decides whether the next broadcast repeats the same mistake or fixes it, and that's what comes next.
- Your list or lists sized by bucket, staying under 256, with room for this month's additions and removals
- The send time decided: the same one your business already uses, never a new one
- How to split into batches if any list goes over 100 contacts
- The first broadcast scheduled, with the list and date noted so you can review what happened
Test yourself
Answer before opening each one. If one gives you trouble, go back to the section that explains it.
1. You have a broadcast list with 240 contacts saved and want to add 10 new customers from this month.
You don't add them: the list is nearly full, with no room for next month's additions or removals. Before adding anyone, you need to remove contacts who haven't replied in months or create a new list for the newcomers.
2. A neighborhood business with 45 customers saved on their phone is considering splitting the broadcast into three buckets like they were taught.
With so few contacts, it's not worth it: splitting into three lists of 15 doesn't change anything, since the volume never comes close to maxing out any of them, and it triples the work of putting the message together. One list is enough.
3. You're about to send your monthly broadcast to 130 contacts, and you want to get it out as soon as possible, all at once, at nine o'clock Saturday night.
Change the time and split it into two batches. Saturday night isn't the slot that the business usually sends at, and sending to 130 people all at once leaves you with every reply hitting at the same time, on a Saturday night; send during the usual hours instead and split it into two batches of 65, twenty minutes apart.
The broadcast is out, split up and sent at the right time. Tomorrow comes the part that really matters: who opened it, who bought, and what you'll change before the next one.
NextWho opened it, who bought, and who never wrote back